Socket-wrench



(No Model.)

M. B RASSELL. SOCKET WRENCH.

o. 533,342. Patented Jan. 29, 1895.

UNITED STATES PATENT OFFICE.

MICHAEL BRASSELL, OF BOSTON, ASSIGNOR OF ONE-HALF TO PATRICK H. CROWLEY,OF READVILLE, MASSACHUSETTS.

SOCKET-WRENCH.

SPECIFICATION forming part of Letters Patent No. 533,342, dated January29, 1895.

Application filed January 6 1 8 94.

To all whom it may concern:

Be it known that 1, MICHAEL BRASSELL, of Boston, in the county ofSuffolk, State of Massachusetts, have invented certain new and usefulImprovements in Socket-Wrenches, of which the following is a descriptionsufiiciently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference being had to the accompanying drawings, forming part-ofthis specification, in which Figure 1 is a side elevation of my improvedsocket-wrench; Fig. 2, a vertical longitudinal section of the same; andFig. 3 an-end'elevation of the same.

Like letters of reference indicate corresponding parts in the differentfigures of the drawings.

My invention relates to socket nut-wrenches provided with spring-pushedadjustable, flaring jaws; and it consistsin certain novel featureshereinafter fully set forth and claimed, the object being to produce asimple, cheap and efiective device of this character.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation:

In the drawings, A represents the body of the wrench which is providedwith a T-handle, B, the end of the shank being chambered longitudinallyat, C, the walls of said chamber converging inwardly. The upper wall ofthe chamber is slotted longitudinally at, f. The jaws,D E, have theirends pivoted together at, g, and a screw, h, projecting through theslot, f, is turned into the jaw, E, through a slot, i, in the jaw, D,which is arranged to permit said jaw to play vertically. The screwserves as a guide or thumb'piece to project the jaws and as a clamp tohold said jaws in an assumed position. In suitable sockets, j, on theinner face of the jaw a coiled spring, is, is disposed, said springacting expansively to spread the jaws. The outer faces of the Serial No.495,886- (No model.)

jaws are beveled inwardly at, m, where they engage the upper and lowerwalls of the chamber, C, so that as the jaws are drawn inward into saidchamber they will be closed by said walls. The free ends of the jaws areprovided with angular sinks, 19, arranged longitudinally so that whenthe jaws are closed said sinks form a square socket, as shown in Fig. 3,to receive the nut. V

In the use of my improvement the jaws are forced outward as in Fig. 2,spreading their free ends a suificient distance to receive the nut, whenby driving the handle forward onto the jaws they are compressed, tightlyclamping the nut in the socket, p. By rotating the handle the nut can beturned on or off in a manner which will be readily understood without amore explicit description. As soon as pressure is released on the handlethe jaws are relieved permitting the spring, is, to act to disengagethem from the nut.

I am aware that wrenches have been constructed with jaws held apart by aspring and do not claim such broadly when in and of itself considered.

Having thus explained my invention, what I claim is In a socket-wrenchthe combination With the body provided with the handle, B, and fiaringlychambered at, C, longitudinally through its opposite end,a wall of saidchamber being slotted at, f, of the jaws, D, E, pivoted together at, j,and having the beveled edges, m, and angular sinks, p; the spring, 70,disposed between the free ends of said jaws and acting expansively tospread them; and the screw, h, passing through the slot, f, and turnedinto one of said jaws; the companion jaw being fitted to slide on saidscrew, all being arranged to operate substantially as described.

MICHAEL BRASSELL.

Witnesses:

K. DURFEE, O. M. SHAW.

